First, we  use shackle to link the swivel of  saddle chain and the lifting eye of the 1.8m diameter lateral buoy in deep water , then we use swivel to link the sink stone with a long link chain.

Second, we put the buoy into the water by crane, and then the sinking stone will be also put into the water. 

Third, Don't forget to clean up the work place. and please observe the working buoy carefully to make sure everything goes well.